ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble 2008-2021 Subaru STI (15-17 STI

2008-2021 Subaru STI (15-17 STI W/OEM SOUND TUBE DELETE)**

etc to squeegee out the remaining water

Each Alpha radiator uses a dual core design with high flowing fins to maximize performance

replacements

ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble 2008-2021 Subaru STI (15-17 STIISR Performance Universal Exhaust Silencers 3" or 4" Can be used on any Exhaust system with 3" or 4" tips. Exhaust needs to be drilled to accommodate the Silencer set screw hole. Set Screw not included This item is non application specific. Please verify compatibility before purchase. May require some modification for proper installation. Note: ISR orders might take a day of processing. If you need it sooner, contact us directly.